Yoke.



' j PIIENT OFFICE.

ROY I, eoox, OF CHICAGO, ILLINOIS, AssIGNoR or oNnHALr To GEORGE e.MURRAY, or GHICAGQ'ILLINOIS.

YOKE.

yTo'all/wifrmv. it may. concern.'

lof the Unitedl States, lresiding at Chicago, in

the conntygof Cook and State of Illinois,

The Object of thisinvent-ion 1s to-provideka new and improved yoke,together with allied elements coacting between suchy yoke andra eopulerbutt to provide a positive engagement against draft-strains between theyoke and coupler. :Another object is to provide a egnstruction of theclass described which will-'enable ,ready assembling and disassembling of the couplerand yoke.

. the accompanying drawings,

of follower plates.

` These and othery objectswill be set forth in the followingspecification and as shownin in which- Figure 1"-fis a perspeetive viewpartly in section of my invention as applied to a rail way car.

Fig. 2 is a perspective of the yoke. n Fig. 3 is a transverse riggingdraft members ofa car along the line 3,3 of Fig.l 1; and

Fig. 4 is a side elevation draw .to a re# `duced scale showing themanner of assem blinr the coupler and yoke.

Like numerals;y y refer to like elements in which 10 des ignates draft"'"'sills of a car carrying the cheek or draft plates able lugs lforcoaction with the usual form Carried between the cheek plates 11 is theyoke 12 having a rear end 12a against which abnts a follower 123. Otherfollowers 13 are similarly carried between the arms of the yoke 12, andcoil springs 111 eoaet therewith in the usual manner, rthe type of draftrigging shown being that known as tandem in which two sets of followersand springs are used. At its for ward ond the yoke 12 is open, arms ofthe yoke 12 being inwardly extended to form lugs 12b (sce Fig. 1) theselugs 12b being inturned as shown in the drawings.

Wings l2extend between and are preferably .formed integral with theforward ends oi the arms of the yoke 12 (see Fig. 'lfiiese wings 12 areslotted at 12d for a paru pose to be hereinafter described. The wingsSpecification of Letters Patent.

Application filed March 13, 1914. Serial No. 824,504.

section through'the 11 provided with suitthe ends of the Patented May 1,19'1'7.4

122 serve to prevent spreading of the yoke arms at the open end ofthe.yoke and thcreby serveto maintain the inturned lugs 12b in fixedrelation. The coupler rbar 15 is provided with the enlarged butt 15forming the shoulders 15b, as clearly shown in Figs. 1 and 4, forexample. This coupler butt 15 is of such dimensions as to enable itsinsertion between the inturned ends onv lugs 12b i of the yoke 'when thedevice is assembled.

In such assembling before the draft rigging properis placed in the yoke12, the' coupler is inserted, as stated, between the lugs 121 and passedrearwardly in the yoke 12 to the position shown in Fig. 1l, that is,rearwardly of the side wings 12. lVhen in this position what I term thekey blocks 16 are placed in'position, as shown in Fig. 4, whereupon thecoupler bar is drawn out to position shown in Fig. 1 permitting theplacing of the draft rigging. Each of these key blocks 16 comprises therearwardly extending portion 16a and the enlarged forward end 1Gb havin@the shoulder 16 contacting with the shoulder 15b of tlie'coupler butt15a. The head 1Gb of each block 16 is of a size to suo stantially extendbetween the coupler bar 15 yoke 12'and the body portion 1Ga of suchbloekextends substantially between the coupler butt 15 and the adjacent armof the yoke 12. These blocks areconstruetcd to fit as closely aspossible while permitting a slight forward and back movement of thecoupler relative to the yoke vin this form ofl tandem rigging in meetingthe usual draft and buiiing strains and shocks. It will be obvious thatin applying my invention to the single rigging I may omit the keyusually provided and rely upon these'blocks 16 to prevent accidentaldisassembling of the drawbar and yoke.` The side wings 12c will serve toprevent accidental displacement or side slip of the key blocks 1 6, asparent, and the :body `portion 16'sL thereof is made of a sufficientlength to prevent falling down or janine` 1g of the blocks between theshoulder 15b and the lugs or inturned ends 12b. l'The depth andthickness of the heads 16b is sufiieient to rovidev a reqlired strengthbetween the coup er butt andthe yoke according to the strains andstresses met with in use.I The coupler bar 15 is'apertured, as indicatedat 15, and a key 17 is. adapted to exwill be ap- Iii tend through theaperture 15c as well as through the slots l2, the slots 12d being ofsuoli size as to permit any sliding therein of such key 17, u'hile thelatter closely lits the aperture 15 in the coupler 15. Suitable ing ashouldered butt, the butt of said coilpler being of such size as topermit the insertion thereof bel'zween said lug portions, key blockmembers located between the shoulders of said coupler butt and said lugslots are provided in the draft sills tov per-g portion,'and means tonormally prevent disinit sliding therein ol the key 17. The slots 12dare preferably arranged so that the key 17 Will contact with the forwardend thereot' at the same time the shoulders 15b of the coupler butt 15abegin to press against the heads of the filler block 16, forcing thelatter against the lugs 12". It will be apparent by this means that thepermitted stress or strain on draft shocks. may be greatly increasedover the amount ofthe same permitted when merely the key construction isused and I may provide a greater factor of safety by increasing thedepth of the head 16b on filler block 16 by slightly altering dimensionsof the allied parts. Such necessary alterations may be readily madewithout interfering with the necessary limits as established byconventional car building practice. These alterations may not be madebeyond certain limits to. increase the resisting strength in the keyconstruction.

It apparent that I may modify or alter dimensions or constructions shownwithout affecting the operation of my invention and I do not wish to berestricted to the form shown and described beyond the scope of theappended claims.

What I claim is:

1. In combination, a yoke having inwardly directed lug portions, acoupler havplacement of said key block members, said means beingarranged to prevent spreading of the arms of said yoke adjacent said lugportions, said last named means comprising wings integrally formed withand extending between the arms of said yoke.

2. In combination, a yoke having inwardly directed lug portions, acoupler having a shouldered butt, the butt of said coupler being of suchsize as to permit the insertion thereof between said lug portions, keyblock members located between the shoulders of sai-al coupler butt andsaid lug portion, means to normally prevent displacement of said keyblock members, said means being arranged to prevent spreading of thearms of said yoke adjacent said lug portions, said last named meanscomprising wings integrally formed zvith and extending between the armsof said yoke, and means coacting with said coupler butt and said wingsto substantially prevent rearward movement of the former relative to thelatter.

In testimony `whereof, I have subscribed my name.

RoYJ. oooK.

Alilitnesses':

Henn! A. PARKS, HELEN D., FnEUNn.

